Diarrhea to constipation

So my baby is 4 days old.

Yesterday she had more liquid poop diapers than pee diapers. She was on similac pro advance and while feeding her, you could hear her tummy rumble and 30 min later she would poop liquid.

Today we switched her formula to similac total comfort to ease her stomach from what looked like Diarrhea. Well today she hasn't pooped at all but pushes and cries hysterically for an hour. She's farting a lot and burping between oz.

I dont know how to help her. Any advise would be great